How to create multiple issues with Create on Transition plugin form Checkbox list?

On create issue on post function I have a checkbox list in the original issue and I only want to create issues for the ones that are checked. Right now it creates them for every value checked or not. What am I missing here?create-on-transition.JPG

As a Belgian, beer-lover and home brewer, beer is one of my great passions. I love the fact that with just a few ingredients (usually just water, hop and malt) you can create so many different tastes...